I have inherited a database full of terrible (and old) markup
and wanted to run it through a filter to clean and convert it to
xhtml. I've focused on using JTidy, the java port of HTML tidy (
http://jtidy.sourceforge.net/).

The project has no installation documentation, and I was
wondering whether anyone uses Jtidy and if so how did you install
it...the build is not clear to me on where the actual files should
reside and what class path (if any) to register.

Any other preferred FREE products out there that can do the
same thing?